Setup AirVPN to work with Plex Media Server

[snookerdoodle 0]

I have had MyPlex set up an working for a while now and it has been working perfectly. I recently set up AirVPN on my DDWRT router. Now Plex is not working. I am sure it is due to a port needing to be forwarded, however I have tried to forward the port through Air and keep getting Error: 111. I have been looking on the forum and found a few suggestions but could not get them to work. Can anyone give a newbie approach to getting Plex to work the VPN on my router?

Thanks

[PsychoWolf 16]

https://airvpn.org/index.php?option=com_kunena&func=view&catid=3&id=5070&Itemid=142#5072

Search is your friend